Picture: METEOSAT Oct 2000 Tropospheric O Tropospheric O 3 3 budget budget of the of the South Atlantic region South Atlantic region B. Sauvage, R. V. Martin, A. van Donkelaar, I. Folkins, X.Liu, P. Palmer, V. Thouret , A. M. Thompson, P. Bernath & K. Chance
Tropospheric O 3 budget of the South Atlantic region. B. Sauvage, R. V. Martin, A. van Donkelaar, I. Folkins, X.Liu, P. Palmer, V. Thouret , A. M. Thompson, P. Bernath & K. Chance. Picture: METEOSAT Oct 2000. Outstanding scientific issue in the Tropics. - PowerPoint PPT Presentation
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Picture: METEOSAT Oct 2000
Tropospheric OTropospheric O33 budget budget
of the of the
South Atlantic regionSouth Atlantic region
B. Sauvage,
R. V. Martin, A. van Donkelaar, I. Folkins, X.Liu, P. Palmer, V. Thouret , A. M. Thompson,
P. Bernath & K. Chance
Outstanding scientific issue in the TropicsOutstanding scientific issue in the Tropics
GOME Seasonal Tropospheric O3 Columns 2000DJF
MAM
JJA
SON
Topic: O3 maximum zonal wave-one (from Fishman et al. 1987… to Wang et al 2006)
Scientific interest:
year-round pattern observed since the 80’s. Situated in MT-UT O3 critical for radiative effect Key role on the oxidizing power of the atmosphere O3 maximum attributed to various anthropogenic and natural sources + dynamics
Goal:
What controls O3 maximum?
(Sources / regions)
data from Liu et al 2005DU
MethodologyMethodology
What controls
the O3 maximum?
High estimation emissions uncertainty
Global chemical transport model GEOS-Chem “Original” simulation
1
Constraint & Evaluation
In-situ & satellite observations
Lightning: spatial distribution scaled to OTD-LIS
Soils: a posteriori inventory of NOx from GOME (Jaeglé et al., 2005)
Biomass burning: top-down constraint on NOx & VOCs from GOME
2
Quantification (sources / regions)
O3 maximum
3Constrained
“standard” simulation
Space-based constraint on emissionsSpace-based constraint on emissions
NO
h
O3
NO2
HNO3Lifetime hoursVOC
OHHCHOh
hoursCO
hours
PBL
NOx VOC
Free Troposphere
NO NO2
O3, HO2
hv
HNO3
NOx lifetime ~ week
O3
lifetime ~ month
O3
lifetime ~ days
Tropospheric NO2 column ~ ENOx
Tropospheric HCHO column ~ EVOC GOME: 320x40 km2
OTD-LIS Lightning flash rates
Effect of satellite constraint in simulated tropospheric column O3Effect of satellite constraint in simulated tropospheric column O3